cinch[sintʃ]n.1.■(系住马鞍的)肚带2.■[口语]紧握，抓牢3.■[俚语]有把握的事情；容易做的事情；必然发生的事情vt.1.■给(马)系紧肚带；紧紧地捆上：He cinched the belt of his knapsack around his shoulders.他把背包带紧紧地拴在肩膀上。2.■[俚语]确实把握住；确保；弄清楚：Ability and hard work cinched his success.才干与努力保证了他的成功。vi.1.■捆紧马肚带：to cinch up束紧腹带dead cinch[美国英语]确定无疑的事